package cn.interestingshop.servlet;

import cn.interestingshop.entity.User;
import cn.interestingshop.service.UserService;
import cn.interestingshop.service.impl.UserServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet("/back/UserSelectAllServlet")
public class UserSelectAllServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.设置编码
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=UTF-8");
        //2.获取请求参数
        String pageNo = request.getParameter("pageNo");
        if(pageNo==null || pageNo.equals("")){
            pageNo="1";
        }
        //写死每页显示的条数
        int pageSize=3;
        //3.调用service进行业务处理
        UserService service=new UserServiceImpl();
        //查询用户数据
        List<User> list = service.selectAll(Integer.parseInt(pageNo), pageSize);
        //查询用户数量
        int totalCount = service.selectCount();
        //计算分页数
        int totalPage=0;
        if(totalCount%pageSize==0){
            totalPage=totalCount/pageSize;
        }else{
            totalPage=totalCount/pageSize+1;
        }
        //4.分析返回结果
        request.setAttribute("pageNo",pageNo);
        request.setAttribute("totalCount",totalCount);
        request.setAttribute("totalPage",totalPage);
        request.setAttribute("list",list);

        request.getRequestDispatcher("/back/Member_UserList.jsp")
                .forward(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request,response);
    }
}
